CVE-2026-82591

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory published 2026-08-31. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A security vulnerability has been detected in Open Asset Import Library Assimp up to 6.0.2. The impacted element is the function MD5Importer::MakeDataUnique of the file code/AssetLib/MD5/MD5Loader.cpp. The manipulation of the argument iNewIndex leads to heap-based buffer overflow. The attack can only be performed from a local environment. The identifier of the patch is bf9dabb617c46e5133dac65cca6bff177917afcb. Applying a patch is the recommended action to fix this issue.

CVSS v3
5.3
EG Score
5.3(high)
EG Risk
24(Track)
EG Risk 24/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity53% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

August 30, 2026

Last Modified

September 1, 2026

Advisory Details (2)

Auto-updated Aug 30, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr, github_commit.
github_commit

commit bf9dabb617c4 (assimp/assimp)

Fix landed in assimp/assimp commit bf9dabb617c4 — awaiting tagged release

https://github.com/assimp/assimp/commit/bf9dabb617c46e5133dac65cca6bff177917afcb
github_pr

Fix heap-buffer-overflow write in MD5 MakeDataUnique

Fix merged in assimp/assimp PR #6718 on 2026-08-04 — awaiting tagged release

https://github.com/assimp/assimp/pull/6718

Vendor Advisories for CVE-2026-82591(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
assimp5.2.5~ds0-1 ... 6.0.5+ds-1 (14 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
assimp5.4.3+ds-2 ... 6.0.5+ds-1 (7 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
assimp5.4.3+ds-2 ... 6.0.5+ds-1 (7 versions)——

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 19× in last 7d / 61× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-20 23:56 UTCEG score recompute
  2. 2026-09-20 23:56 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-19 23:57 UTCEG score recompute
  5. 2026-09-19 23:57 UTCGHSA enrichment
  6. 2026-09-18 23:58 UTCEG score recompute
  7. 2026-09-18 23:58 UTCGHSA enrichment
  8. 2026-09-18 19:28 UTCEPSS rescore
  9. 2026-09-17 23:59 UTCEG score recompute
  10. 2026-09-17 23:59 UTCGHSA enrichment
  11. 2026-09-16 23:49 UTCEG score recompute
  12. 2026-09-16 23:49 UTCGHSA enrichment
  13. 2026-09-16 14:08 UTCEPSS rescore
  14. 2026-09-16 05:15 UTCEPSS rescore
  15. 2026-09-15 23:50 UTCEG score recompute
  16. 2026-09-15 23:50 UTCGHSA enrichment
  17. 2026-09-15 03:12 UTCEPSS rescore
  18. 2026-09-15 03:12 UTCEPSS rescore
  19. 2026-09-14 23:51 UTCGHSA enrichment
  20. 2026-09-13 23:52 UTCEG score recompute
  21. 2026-09-13 23:52 UTCGHSA enrichment
  22. 2026-09-12 23:54 UTCEG score recompute
  23. 2026-09-12 23:54 UTCGHSA enrichment
  24. 2026-09-11 23:55 UTCEG score recompute
  25. 2026-09-11 23:55 UTCGHSA enrichment
Show 36 more
  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-11 14:53 UTCEPSS rescore
  3. 2026-09-10 23:56 UTCEG score recompute
  4. 2026-09-10 23:56 UTCGHSA enrichment
  5. 2026-09-09 23:50 UTCGHSA enrichment
  6. 2026-09-08 23:36 UTCEG score recompute
  7. 2026-09-08 23:36 UTCGHSA enrichment
  8. 2026-09-08 22:01 UTCEPSS rescore
  9. 2026-09-07 20:59 UTCEG score recompute
  10. 2026-09-07 20:59 UTCGHSA enrichment
  11. 2026-09-06 21:01 UTCEG score recompute
  12. 2026-09-06 21:01 UTCGHSA enrichment
  13. 2026-09-06 13:48 UTCEPSS rescore
  14. 2026-09-05 21:02 UTCEG score recompute
  15. 2026-09-05 21:02 UTCGHSA enrichment
  16. 2026-09-05 15:31 UTCEPSS rescore
  17. 2026-09-04 21:03 UTCEG score recompute
  18. 2026-09-04 21:03 UTCGHSA enrichment
  19. 2026-09-04 05:07 UTCEPSS rescore
  20. 2026-09-03 21:02 UTCGHSA enrichment
  21. 2026-09-02 21:03 UTCEG score recompute
  22. 2026-09-02 21:03 UTCGHSA enrichment
  23. 2026-09-02 14:12 UTCEPSS rescore
  24. 2026-09-01 21:02 UTCGHSA enrichment
  25. 2026-09-01 19:35 UTCEG score recompute
  26. 2026-09-01 19:35 UTCGHSA enrichment
  27. 2026-09-01 13:54 UTCEPSS rescore
  28. 2026-09-01 04:40 UTCEPSS rescore
  29. 2026-09-01 04:40 UTCEPSS rescore
  30. 2026-08-31 19:28 UTCEG score recompute
  31. 2026-08-31 19:28 UTCGHSA enrichment
  32. 2026-08-31 19:07 UTCEG score recompute
  33. 2026-08-31 19:06 UTCGHSA enrichment
  34. 2026-08-30 23:27 UTCEG score recompute
  35. 2026-08-30 22:52 UTCEG score recompute
  36. 2026-08-30 22:52 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-82591?
CVE-2026-82591 is a medium vulnerability published on August 30, 2026. A security vulnerability has been detected in Open Asset Import Library Assimp up to 6.0.2. The impacted element is the function MD5Importer::MakeDataUnique of the file code/AssetLib/MD5/MD5Loader.cpp. The manipulation of the argument iNewIndex leads to heap-based buffer overflow. The attack can…
When was CVE-2026-82591 disclosed?
CVE-2026-82591 was first published in the National Vulnerability Database on August 30, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-82591 actively exploited?
CVE-2026-82591 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 97.5% of all scored CVEs.
What is the CVSS score of CVE-2026-82591?
CVE-2026-82591 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-82591?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-82591, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-82591

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